Bed



FIG. 1 is a perspective view of a bed comprising the new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a left side elevation view thereof; and,

FIG. 5 is a right side elevation view thereof.

The phantom lines that appear in FIGS. 1 through 5 illustrate environment only and form no part of the claimed design. 

The ornamental design for a bed, as shown and described. 